@article {1726, title = {Spermatogenesis, spermiogenesis and sperm structure in Crenobia (Planaria) alpina (Dana)}, journal = {Z Zellforsch Mikrosk Anat}, volume = {97}, year = {1969}, month = {1969}, pages = {549-63}, keywords = {Animals, Cell Division, Cell Nucleus, Cytoplasm, Flagella, Male, Microscopy, Phase-Contrast, Spermatozoa, Staining and Labeling, Turbellaria}, issn = {0340-0336}, author = {van der Linden, A G} }